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use std::path::PathBuf;
use clap::{arg, command, value_parser, ArgAction, ArgGroup};
fn main() {
// Create application like normal
let matches = command!() // requires `cargo` feature
// Add the version arguments
.arg(arg!(--"set-ver" <VER> "set version manually"))
.arg(arg!(--major "auto inc major").action(ArgAction::SetTrue))
.arg(arg!(--minor "auto inc minor").action(ArgAction::SetTrue))
.arg(arg!(--patch "auto inc patch").action(ArgAction::SetTrue))
// Create a group, make it required, and add the above arguments
.group(
ArgGroup::new("vers")
.required(true)
.args(["set-ver", "major", "minor", "patch"]),
)
// Arguments can also be added to a group individually, these two arguments
// are part of the "input" group which is not required
.arg(
arg!([INPUT_FILE] "some regular input")
.value_parser(value_parser!(PathBuf))
.group("input"),
)
.arg(
arg!(--"spec-in" <SPEC_IN> "some special input argument")
.value_parser(value_parser!(PathBuf))
.group("input"),
)
// Now let's assume we have a -c [config] argument which requires one of
// (but **not** both) the "input" arguments
.arg(
arg!(config: -c <CONFIG>)
.value_parser(value_parser!(PathBuf))
.requires("input"),
)
.get_matches();
// Let's assume the old version 1.2.3
let mut major = 1;
let mut minor = 2;
let mut patch = 3;
// See if --set-ver was used to set the version manually
let version = if let Some(ver) = matches.get_one::<String>("set-ver") {
ver.to_owned()
} else {
// Increment the one requested (in a real program, we'd reset the lower numbers)
let (maj, min, pat) = (
matches.get_flag("major"),
matches.get_flag("minor"),
matches.get_flag("patch"),
);
match (maj, min, pat) {
(true, _, _) => major += 1,
(_, true, _) => minor += 1,
(_, _, true) => patch += 1,
_ => unreachable!(),
};
format!("{major}.{minor}.{patch}")
};
println!("Version: {version}");
// Check for usage of -c
if matches.contains_id("config") {
let input = matches
.get_one::<PathBuf>("INPUT_FILE")
.unwrap_or_else(|| matches.get_one::<PathBuf>("spec-in").unwrap())
.display();
println!(
"Doing work using input {} and config {}",
input,
matches.get_one::<PathBuf>("config").unwrap().display()
);
}
}